Zimmerman trial: Lead detective takes stand

The George Zimmerman murder trial for the 2012 shooting of 17-year-old Trayvon Martin is underway in Seminole County, Florida. Defense attorney Mark O'Mara.Zimmerman is standing trial in the shooting death of Trayvon Martin, a Florida teen who was walking to his father's fiancee's home in the community. Zimmerman claims he shot the teen in self-defense. In the Feb. 29 interview tape, Serino and Det.From FNC Serafin Gomez — Video of George Zimmerman undergoing DNA swab, sample to police. Sanford Police investigator Doris Singleton still on stand. Jurors watching attentively. Serafin Gomez Miami Bureau (CNN) -- HLN, CNN's sister network, is covering the George Zimmerman trial, gavel to gavel. Zimmerman is charged with second-degree murder in the death of 17-year-old Trayvon Martin on February 26, 2012. Here is testimony from Monday:

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